STM32WLE5 in a E77-400M22S modue OpError 0x20

[davefes]

Had another go with the latest V1.22 Nucleo_WL55 with a modified mpconfigboard.h that has #define MICROPY_HW_CLK_USE_BYPASS (0) as per discussion https://github.com/orgs/micropython/discussions/13110

However, still getting the same error:

Initializing...
Traceback (most recent call last):
  File "main.py", line 15, in <module>
  File "simple_rxtx.py", line 26, in <module>
  File "simple_rxtx.py", line 22, in get_modem
  File "lora/stm32wl5.py", line 65, in __init__
  File "lora/sx126x.py", line 174, in __init__
  File "lora/sx126x.py", line 697, in _cmd
  File "lora/sx126x.py", line 292, in _wakeup
  File "lora/sx126x.py", line 329, in _check_error
RuntimeError: Internal radio Status (2, 1) OpError 0x20
MicroPython v1.22.0-preview.208.gb5449b0f0.dirty on 2023-12-08; NUCLEO-WL55 with STM32WL55JCI7

sx126x.py Op Error 0x20 (bit 5) XOSC_START_ERR

XOSC is the 32MHz crystal.

I suspect I am getting as far as line 220 in sx126x.py

self._cmd(">BI", _CMD_SET_DIO3_AS_TCXO_CTRL, (reg_tcxo_trim << 24) + timeout)
time.sleep_ms(15)
# As per DS 13.3.6 SetDIO3AsTCXOCtrl, should expect error
# value 0x20 "XOSC_START_ERR" to be flagged as XOSC has only just
# started now. So clear it.
self._clear_errors()

self._check_error()

1st call to check_errors() is line 220 ... setting up the dio3_tcxo_millivolts. Possibly, it is getting to wake_up line 292.

In the E77-400M22S user manual are these comments:

Note 2: The PC14-OSC32_IN and PC15-OSC32_OUT pins have been connected to a 32.768KHz crystal oscillator inside
the module for users to choose and use in secondary development.
Note 3: The OSC_IN and OSC_OUT pins have been connected to a 32MHz crystal oscillator inside the module for
users to choose and use in secondary development.

Are these a clue? I don't understand how to chose OSC_IN and OSC_OUT and PC-14/PC-15 are not in mpconfigboard.h.

[davefes]

According to:
rm0453-stm32wl5x-advanced-armbased-32bit-mcus-with-subghz-radio-solution-stmicroelectronics.pdf
OpError_XoscStartError: HSE32 clock startup failed

There are about 1000 hits on HSE32 in the above manual. I assume they are referring to the 32MHz oscillator not the 32KHz.

As the module has an 32KHz oscillator on-board I also tried unsetting:

#define MICROPY_HW_RTC_USE_LSE                  (0)
#define MICROPY_HW_RTC_USE_US                   (0)

no luck.

I thought #define MICROPY_HW_CLK_USE_BYPASS (0) was to get the 32MHz oscillator running.

Does the 32MHz osc need to run to get REPL?